Melanoma in situ of other parts of face

This code signifies a non-invasive malignant melanoma confined to the epidermis (in situ) located on the face, excluding the eyelid, ear, and other specified facial sites. It represents the earliest stage of melanoma, where abnormal melanocytes are present but have not invaded the dermis.

Apply this code when documentation confirms a diagnosis of melanoma in situ specifically on the face, excluding sites with more specific codes. Pathological reports confirming melanoma in situ and surgical reports indicating the facial location are key supporting documents.

• Ensure the documentation explicitly states "in situ" and specifies a facial location other than the eyelid or ear.
• Distinguish from invasive melanoma of the face, which would require a different code from the C43 series.
• Do not use for melanoma of the eyelid (D03.1-) or ear (D03.2-); these have more specific codes.